What is it about?
This paper confirms observations by White et al. (2012) made at lower speeds about the average velocity profile of a turbulent boundary layer modified with polymer solution. Furthermore, there is evidence that the velocity profile at maximum drag reduction is not logarithmic as has been assumed since the 1960s.
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Why is it important?
Adding polymer solution to liquid boundary layers, which includes the flow around a ship hull, can significantly reduce the drag. This paper provides insights into how the polymer solutions change the mean velocity profile, which results in the drag reduction.
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This page is a summary of: Modification of the mean near-wall velocity profile of a high-Reynolds number turbulent boundary layer with the injection of drag-reducing polymer solutions, Physics of Fluids, August 2013, American Institute of Physics,
DOI: 10.1063/1.4817073.
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